@article{KretschmannVockLuedtke2014,
  author    = {Julia Kretschmann and Miriam Vock and Oliver Luedtke},
  title     = {Acceleration in elementary school: using propensity score matching to estimate the effects on academic achievement},
  journal   = {The journal of educational psychology},
  volume    = {106},
  number    = {4},
  pages     = {1080 -- 1095},
  doi       = {10.1037/a0036631},
  year      = {2014},
}